<!DOCTYPE html>
<html>
  <head>

    <meta charset="UTF-8">
    <title>Hello World!</title>
    <link rel="stylesheet" type="text/css" href="css/index.css">
    <link rel="stylesheet" type="text/css" href="css/all.css">
    <script>window.$ = window.jQuery = require('jquery');</script>
  </head>
  <body>
  <div id="content">

    <a href="html/input_numbers.html">
      <div id="begin"><p>开始游戏</p></div>
    </a>
    <a href="javascript:window.opener=null;window.open('','_self');window.close();">
    <div id="exit"><p>退出</p></div>
    </a>
  </div>
  </body>
</html>